CN210516609U - Strut type vacuum circuit breaker - Google Patents
Strut type vacuum circuit breaker Download PDFInfo
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- CN210516609U CN210516609U CN201921497488.8U CN201921497488U CN210516609U CN 210516609 U CN210516609 U CN 210516609U CN 201921497488 U CN201921497488 U CN 201921497488U CN 210516609 U CN210516609 U CN 210516609U
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- switching
- driving
- energy storage
- separating brake
- circuit breaker
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- 238000004146 energy storage Methods 0.000 claims description 47
- 230000005540 biological transmission Effects 0.000 claims description 15
- 230000001939 inductive effect Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 3
- 230000005350 ferromagnetic resonance Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000003745 diagnosis Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model discloses a strut type vacuum circuit breaker, including the support, be used for the current transformer of the electric current that produces when the response breaks down, be used for the zero sequence voltage sensor of the size of response zero sequence voltage when breaking down with be used for driving the actuating mechanism of utmost point post action through setting up zero sequence voltage sensor, does not contain the iron core, can not saturate, and frequency range is wide, measuring range is big, the linearity is good, can respond to zero sequence voltage, improves the accuracy that the trouble was judged, guarantees the stability of work to can not produce the overvoltage when the current output secondary was opened a way, can not produce ferromagnetic resonance yet, eradicated the major fault hidden danger in the electric power system operation, ensured the safety of personnel and equipment.
Description
Technical Field
The utility model belongs to the technical field of the electric wire netting technique and specifically relates to a pillar type vacuum circuit breaker.
Background
The vacuum circuit breaker is one of the common devices in the power grid, the current common vacuum circuit breaker generally only is provided with a current transformer to detect the magnitude of zero sequence current, zero sequence voltage cannot be detected, and the controller is easy to misjudge when three-phase load unbalance is serious or adjacent users have single-phase earth faults, so that the circuit breaker has malfunction, and the normal operation of the power grid is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, an object of the utility model is to provide a column vacuum circuit breaker can detect zero sequence voltage, improves the accuracy of failure diagnosis, guarantees the stability of work.
The utility model provides a technical scheme that its problem adopted is:
an embodiment of the utility model provides a column type vacuum circuit breaker, include:
the device comprises a support, a voltage input device and a pole, wherein the end part of the pole is provided with a contact;
the current transformer is used for inducing current generated when a fault occurs, is arranged on the bracket and is electrically connected with the pole;
the zero sequence voltage sensor is used for sensing the magnitude of zero sequence voltage when a fault occurs, and is arranged on the bracket and electrically connected with the current transformer;
the driving mechanism is used for driving the pole to act and comprises a switching-on and switching-off acting mechanism, a switching-on and switching-off energy storage mechanism and a switching-off and switching-off energy storage mechanism, the switching-on and switching-off acting mechanism comprises a driving pull rod, a connecting plate, a driving connecting rod, a first main shaft, a first gear and a cam, a bump is arranged on the first main shaft, the driving pull rod is connected with the pole through the connecting plate, the driving pull rod is in transmission connection with the driving connecting rod, the first main shaft sequentially penetrates through the first gear and the cam and is in transmission connection with the first gear and the cam, and the driving connecting rod is in transmission connection with the cam; the switching-on energy storage mechanism comprises a switching-on spring, a connecting lever, an energy storage unit for storing energy for the switching-on spring, a switching-on pinch plate, a switching-on half shaft and a switching-on driving unit for driving the switching-on half shaft to rotate, wherein one end of the switching-on spring is fixedly arranged, the other end of the switching-on spring is in transmission connection with the first main shaft through the connecting lever, a first clamping part for locking the switching-on pinch plate is arranged on the switching-on half shaft, and one end of the switching-on pinch plate is positioned in the rotating range of the lug; separating brake energy storage mechanism includes separating brake spring, separating brake buckle, separating brake semi-axis and is used for the drive the rotatory separating brake drive unit of separating brake semi-axis, the fixed setting of one end of separating brake spring, the other end of separating brake spring is connected the drive pull rod, be provided with on the separating brake semi-axis and be used for locking the second joint portion of separating brake buckle, be provided with joint piece and connecting block on the separating brake buckle.
The strut type vacuum circuit breaker at least has the following beneficial effects: through setting up zero sequence voltage sensor, do not contain the iron core, can not saturate, frequency range is wide, measuring range is big, the linearity is good, can respond to zero sequence voltage, improves the accuracy of fault diagnosis, guarantees the stability of work to can not produce the overvoltage when the current output secondary is opened a way, can not produce ferromagnetic resonance yet, eliminate the major fault hidden danger in the electric power system operation, ensured the safety of personnel and equipment.
Furthermore, closing drive unit and separating brake drive unit are the driving lever, the tip of combined floodgate semi-axis is provided with first combined floodgate locking piece, the tip of separating brake semi-axis is provided with first separating brake locking piece, be provided with on the driving lever be used for with first combined floodgate locking piece complex second combined floodgate locking piece and be used for with first separating brake locking piece complex second separating brake locking piece, through with closing drive unit and separating brake drive unit set up to the driving lever, can be convenient for carry on the manual control of combined floodgate and separating brake.
Further, the closing driving unit is a first electromagnetic push rod, the opening driving unit is a second electromagnetic push rod, and the closing driving unit is set as the first electromagnetic push rod and the opening driving unit is set as the second electromagnetic push rod, so that electric control of closing and opening can be facilitated.
Further, the energy storage unit is a rocker, the rocker is meshed with the first gear through a second gear, and manual energy storage can be conveniently carried out by setting the energy storage unit as the rocker.
Further, the energy storage unit is a motor, the motor is meshed with the first gear through a second gear, and electric energy storage can be achieved by setting the energy storage unit as the motor.
Further, actuating mechanism still includes first curb plate and second curb plate, first curb plate and second curb plate constitute parallel bilayer structure, through setting up first curb plate and the second curb plate that constitutes parallel bilayer structure, can improve the holistic stability of actuating mechanism to the installation space of part has been increased.
And furthermore, the switch-on/off pointer is used for indicating the switch-on/off state, and the switch-on/off pointer is in transmission connection with the driving connecting rod, so that the switch-on/off state of the vacuum circuit breaker can be conveniently known.
And the energy storage pointer is connected with the first main shaft, so that the energy storage state of the closing spring can be known conveniently.
Drawings
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic perspective view of a column type vacuum circuit breaker according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of another angle of the pillar type vacuum circuit breaker according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a post-type vacuum circuit breaker according to an embodiment of the present invention;
fig. 4 is a schematic perspective view of a drive mechanism in an embodiment of the present invention;
fig. 5 is a top view of the drive mechanism in an embodiment of the invention;
fig. 6 is a perspective view of the driving mechanism with the second side plate hidden according to an embodiment of the present invention;
fig. 7 is a perspective view of the driving mechanism with the first side plate removed according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a closing half shaft in an embodiment of the present invention;
fig. 9 is a cross-sectional view of the connection of the pole, the drive link and the link plate in an embodiment of the present invention;
fig. 10 is a partial structural schematic view of the shift lever.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1 to 8, an embodiment of the present invention provides a column vacuum circuit breaker, including a support 100, a current transformer 200 for sensing current generated when a fault occurs, a zero sequence voltage sensor 300 for sensing the magnitude of zero sequence voltage when a fault occurs, and a driving mechanism for driving the action of the pole 120, the support 100 is provided with a voltage input device 110 and the pole 120, the end of the pole 120 is provided with a contact 121, the current transformer 200 is disposed on the support 100 and electrically connected with the pole 120, the zero sequence voltage sensor 300 is disposed on the support 100 and electrically connected with the current transformer 200, the driving mechanism includes a switching-on and switching-off actuating mechanism, a switching-on and switching-off energy storage mechanism, and the switching-on and switching-off actuating mechanism includes a driving pull rod 410, a connecting plate 420, a driving connecting rod 430, a driving rod 410, a driving rod 430, a driving rod, The pole post comprises a first main shaft 440, a first gear 450 and a cam 460, wherein a convex block 441 is arranged on the first main shaft 440, the driving pull rod 410 is connected with the pole post 120 through the connecting plate 420, the driving pull rod 410 is in transmission connection with the driving connecting rod 430, the first main shaft 440 sequentially penetrates through the first gear 450 and the cam 460 and is in transmission connection with the first gear 450 and the cam 460, and the driving connecting rod 430 is in transmission connection with the cam 460; the switching-on energy storage mechanism comprises a switching-on spring 510, a connecting lever 520, an energy storage unit for storing energy for the switching-on spring 510, a switching-on pinch plate 530, a switching-on half shaft 540 and a switching-on driving unit for driving the switching-on half shaft 540 to rotate, wherein one end of the switching-on spring 510 is fixedly arranged, the other end of the switching-on spring 510 is in transmission connection with the first main shaft 440 through the connecting lever 520, a first clamping part for locking the switching-on pinch plate 530 is arranged on the switching-on half shaft 540, and one end of the switching-on pinch plate 530 is positioned in the rotation range of the bump 441; separating brake energy storage mechanism includes separating brake spring 610, separating brake buckle 620, separating brake semi-axis 630 and is used for the drive the rotatory separating brake drive unit of separating brake semi-axis 630, the fixed setting of one end of separating brake spring 610, the other end of separating brake spring 610 is connected drive pull rod 410, be provided with on the separating brake semi-axis 630 and be used for locking the second joint portion of separating brake buckle 620, be provided with joint piece 621 and connecting block 622 on the separating brake buckle 620, wherein, joint piece 621 is used for with the joint of separating brake semi-axis 630, and connecting block 622 is used for being connected with drive connecting rod 430.
The voltage input device 110 may be a voltage transformer.
In this embodiment, the outside cover of actuating mechanism is equipped with the protective housing, plays the guard action.
In this embodiment, the first clamping portion and the second clamping portion have the same structure and are both a groove 800, and the closing buckle 530 and the opening buckle 620 are mutually constrained by being abutted against the groove 800. Referring to the drawings, the structure of the first engaging portion is shown by taking a closing half shaft 540 as an example.
In addition, the driving mechanism further comprises a first side plate 710 and a second side plate 720, the first side plate 710 and the second side plate 720 form a parallel double-layer structure, and the first side plate 710 and the second side plate 720 which form the parallel double-layer structure can improve the overall stability of the driving mechanism and increase the installation space of components.
As a preferable scheme, the closing driving unit and the opening driving unit are a shift lever 730, referring to fig. 10, a first closing locking block 541 is disposed at an end of the closing half shaft 540, a first opening locking block 631 is disposed at an end of the opening half shaft 630, a second closing locking block 731 for cooperating with the first closing locking block 541 and a second opening locking block 732 for cooperating with the first opening locking block 631 are disposed on the shift lever 730, and the closing driving unit and the opening driving unit are set as the shift lever 730, so that manual control of closing and opening can be facilitated.
It should be added that, the second closing lock block 731 on the shift lever 730 is mainly used for colliding with the first closing lock block 541, and when the shift lever 730 is shifted to rotate, the second closing lock block 731 can be driven to rotate by the closing half shaft 540 to realize a closing action, so that the position and the shape of the second closing lock block 731 only need to be matched with the first closing lock block 541, and the second closing lock block 732 is the same, and is not described herein again.
In addition, the closing driving unit is a first electromagnetic push rod 740, the opening driving unit is a second electromagnetic push rod 750, and the closing driving unit is set as the first electromagnetic push rod 740, and the opening driving unit is set as the second electromagnetic push rod 750, so that electric control of closing and opening can be facilitated.
The manual control and the electric control modes of the closing drive unit and the opening drive unit can be set simultaneously or alternatively.
As one of the preferable solutions, the energy storage unit is a rocker 760, the rocker 760 is engaged with the first gear 450 through a second gear 761, and manual energy storage can be facilitated by providing the energy storage unit as the rocker 760.
In addition, the energy storage unit is a motor 770, the motor 770 is meshed with the first gear 450 through a second gear 761, and the energy storage unit is set as the motor 770, so that electric energy storage can be realized.
Likewise, the above-mentioned manual and electric control of the energy storage unit may be provided simultaneously or alternatively.
Further, the switch-on/off pointer 780 used for indicating the switch-on/off state is further included, and the switch-on/off pointer 780 is in transmission connection with the driving connecting rod 430, so that the switch-on/off state of the vacuum circuit breaker can be known conveniently.
Further, an energy storage pointer 790 for indicating the energy storage state of the closing spring 510 is further included, and the energy storage pointer 790 is connected with the first main shaft 440, so that the energy storage state of the closing spring 510 can be known conveniently.
Referring to fig. 9, an elastic push rod 122 is disposed in the pole 120, a connecting portion 421 is disposed on the connecting plate 420, one end of the connecting portion 421 is connected to the driving pull rod 410, and the other end of the connecting portion 421 is connected to the elastic push rod 122, so that when the driving pull rod 410 moves horizontally, the elastic push rod 122 moves up and down under the action of the connecting portion 421, and the pole 120 moves up and down.
The energy storage process of the closing spring 510 is as follows: the manual energy storage or electric energy storage mode can be adopted, and the closing buckle 530 is clamped with the closing half shaft 540 in the energy storage process. When the manual energy storage mode is adopted, the rocker 760 is shaken, the rocker 760 drives the first main shaft 440 to rotate through the gear, so that the closing spring 510 is stretched to complete energy storage, and the contact 121 of the pole 120 is disconnected due to the fact that the closing buckle 530 is clamped with the closing half shaft 540 in the energy storage process. If the electric energy storage mode is adopted, the motor 770 is used for driving the first main shaft 440 to rotate, the electric energy storage mode needs an automatic stop function, and a travel switch mode can be adopted, wherein a contact block is arranged on the first main shaft 440, so that the travel switch acts in the rotating process of the first main shaft 440, and the motor 770 is controlled to stop operating.
A switching-on process: the manual switching-on or electric switching-on mode can be adopted. During manual switching, the driving lever 730 is shifted clockwise, the driving lever 730 collides with the first switching-on locking block 541, the switching-on half shaft 540 is driven to rotate, the switching-on half shaft 540 removes the constraint on the switching-on buckling plate 530, the stored energy is maintained to be removed at the moment, the switching-on spring 510 contracts, the first main shaft 440 is driven to rotate through the connecting lever 520, the cam 460 rotates along with the first main shaft 440 and drives the driving connecting rod 430 to move, the driving pull rod 410 moves leftwards, the driving pull rod 410 enables the pole 120 to move upwards through the connecting plate 420, the contact 121 of the pole 120 is connected, and the switching-on operation is completed. During electric switching, the first electromagnetic push rod 740 acts to push the first switching-on locking block 541 to drive the switching-on half shaft 540 to rotate, so that the switching-on half shaft 540 releases the constraint on the switching-on buckle 530, at this time, the stored energy of the switching-on spring 510 is maintained to be released, the switching-on spring 510 contracts, the first main shaft 440 is driven to rotate through the connecting lever 520, the cam 460 rotates along with the first main shaft 440 and drives the driving connecting rod 430 to act to drive the driving pull rod 410 to move leftwards, the driving pull rod 410 drives the pole 120 to move upwards through the connecting plate 420, so that the contact 121 of the pole 120 is switched on, and the switching.
While the driving connecting rod 430 acts, the connecting block 622 drives the opening buckle 620 to rotate, so that the opening buckle 620 is clamped with the opening half shaft 630, the closing state is kept, and the opening spring 610 is in an energy storage state.
The brake opening process: the manual opening or the electric opening can be adopted. When the brake is manually opened, the driving lever 730 is shifted anticlockwise, the driving lever 730 collides with the first brake-separating locking block 631, the brake-separating half shaft 630 is driven to rotate, the brake-separating half shaft 630 releases the constraint on the brake-separating buckle 620, the stored energy of the brake-separating spring 610 is maintained to be released at the moment, the brake-separating spring 610 recovers, the driving pull rod 410 is driven to move rightwards, the pole 120 moves downwards, the contact 121 of the pole 120 is disconnected, and the brake-separating operation is completed; during electric brake opening, the second electromagnetic push rod 750 acts to push the first brake opening locking block 631 to drive the brake opening half shaft 630 to rotate, so that the brake opening half shaft 630 releases the constraint on the brake opening buckle 620, at the moment, the stored energy is maintained to be released, the brake opening spring 610 recovers to drive the driving pull rod 410 to move rightwards, the pole 120 moves downwards, the contact 121 of the pole 120 is disconnected, and the brake opening operation is completed.
When the driving rod 410 moves, the driving link 430 moves along with the driving rod, the driving cam 460 drives the first main shaft 440 to rotate, and the protrusion 441 on the first main shaft 440 collides with the closing buckle 530, so that the closing buckle 530 rotates to be clamped with the closing half shaft 540 again, and the opening state is maintained.
It should be added that, after the closing buckle 530 and the closing half shaft 540 are separated, they will be reset again by the torsion spring; similarly, the opening buckle plate 620 and the opening half shaft 630 are reset again through the torsion spring after being separated.
Through setting up zero sequence voltage sensor 300, do not contain the iron core, can not saturate, frequency range is wide, measuring range is big, the linearity is good, can respond to zero sequence voltage, improves the accuracy of fault diagnosis, guarantees the stability of work to can not produce the overvoltage when the current output secondary is opened a way, can not produce ferromagnetic resonance yet, eliminate the major fault hidden danger in the electric power system operation, ensured the safety of personnel and equipment.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention defined by the appended claims.
Claims (8)
1. A strut-type vacuum circuit breaker, comprising:
the device comprises a support, a voltage input device and a pole, wherein the end part of the pole is provided with a contact;
the current transformer is used for inducing current generated when a fault occurs, is arranged on the bracket and is electrically connected with the pole;
the zero sequence voltage sensor is used for sensing the magnitude of zero sequence voltage when a fault occurs, and is arranged on the bracket and electrically connected with the current transformer;
the driving mechanism is used for driving the pole to act and comprises a switching-on and switching-off acting mechanism, a switching-on and switching-off energy storage mechanism and a switching-off and switching-off energy storage mechanism, the switching-on and switching-off acting mechanism comprises a driving pull rod, a connecting plate, a driving connecting rod, a first main shaft, a first gear and a cam, a bump is arranged on the first main shaft, the driving pull rod is connected with the pole through the connecting plate, the driving pull rod is in transmission connection with the driving connecting rod, the first main shaft sequentially penetrates through the first gear and the cam and is in transmission connection with the first gear and the cam, and the driving connecting rod is in transmission connection with the cam; the switching-on energy storage mechanism comprises a switching-on spring, a connecting lever, an energy storage unit for storing energy for the switching-on spring, a switching-on pinch plate, a switching-on half shaft and a switching-on driving unit for driving the switching-on half shaft to rotate, wherein one end of the switching-on spring is fixedly arranged, the other end of the switching-on spring is in transmission connection with the first main shaft through the connecting lever, a first clamping part for locking the switching-on pinch plate is arranged on the switching-on half shaft, and one end of the switching-on pinch plate is positioned in the rotating range of the lug; separating brake energy storage mechanism includes separating brake spring, separating brake buckle, separating brake semi-axis and is used for the drive the rotatory separating brake drive unit of separating brake semi-axis, the fixed setting of one end of separating brake spring, the other end of separating brake spring is connected the drive pull rod, be provided with on the separating brake semi-axis and be used for locking the second joint portion of separating brake buckle, be provided with joint piece and connecting block on the separating brake buckle.
2. A column type vacuum circuit breaker according to claim 1, wherein: the switching-on driving unit and the switching-off driving unit are shifting rods, a first switching-on locking block is arranged at the end part of the switching-on half shaft, a first switching-off locking block is arranged at the end part of the switching-off half shaft, and a second switching-on locking block matched with the first switching-on locking block and a second switching-off locking block matched with the first switching-off locking block are arranged on the shifting rods.
3. A column type vacuum circuit breaker according to claim 1, wherein: the switching-on driving unit is a first electromagnetic push rod, and the switching-off driving unit is a second electromagnetic push rod.
4. A column type vacuum circuit breaker according to claim 1, wherein: the energy storage unit is a rocker, and the rocker is meshed with the first gear through a second gear.
5. A column type vacuum circuit breaker according to claim 1, wherein: the energy storage unit is a motor, and the motor is meshed with the first gear through a second gear.
6. A column type vacuum circuit breaker according to claim 1, wherein: the driving mechanism further comprises a first side plate and a second side plate, and the first side plate and the second side plate form a parallel double-layer structure.
7. A column type vacuum circuit breaker according to claim 1, wherein: the switching-on and switching-off pointer is used for indicating the switching-on and switching-off state and is in transmission connection with the driving connecting rod.
8. A column type vacuum circuit breaker according to claim 1, wherein: the energy storage pointer is used for indicating the energy storage state of the closing spring and is connected with the first main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921497488.8U CN210516609U (en) | 2019-09-09 | 2019-09-09 | Strut type vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921497488.8U CN210516609U (en) | 2019-09-09 | 2019-09-09 | Strut type vacuum circuit breaker |
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| Publication Number | Publication Date |
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| CN210516609U true CN210516609U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201921497488.8U Active CN210516609U (en) | 2019-09-09 | 2019-09-09 | Strut type vacuum circuit breaker |
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| CN (1) | CN210516609U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112530738A (en) * | 2020-12-02 | 2021-03-19 | 郭文才 | High-voltage circuit breaker switch for power-off protection by utilizing vacuum principle |
-
2019
- 2019-09-09 CN CN201921497488.8U patent/CN210516609U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112530738A (en) * | 2020-12-02 | 2021-03-19 | 郭文才 | High-voltage circuit breaker switch for power-off protection by utilizing vacuum principle |
| CN112530738B (en) * | 2020-12-02 | 2023-04-07 | 宁夏隆基电气有限公司 | High-voltage circuit breaker switch for power-off protection by utilizing vacuum principle |
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Address after: 5th Floor, Building 9, No.88, Keji 9th Road, Tangjiawan Town, High tech Zone, Zhuhai City, Guangdong Province, 519000 Patentee after: Zhuhai Huazhi New Energy Technology Co.,Ltd. Address before: 519000 Floor 1, No. 4, Jinding Jinfeng West Road, Tangjiawan Town, High tech Zone, Zhuhai City, Guangdong Province Patentee before: Zhuhai Huazhi hi tech Electric Co.,Ltd. |
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Address after: 519000, Building 8, 101-2, No. 81 Dingye Road, Tangjiawan Town, High tech Zone, Zhuhai City, Guangdong Province Patentee after: Zhuhai Huazhi New Energy Technology Co.,Ltd. Address before: 5th Floor, Building 9, No.88, Keji 9th Road, Tangjiawan Town, High tech Zone, Zhuhai City, Guangdong Province, 519000 Patentee before: Zhuhai Huazhi New Energy Technology Co.,Ltd. |